I've loved the way you can refine art photos, and am fiddling around with Pixlr express (free version). I may use this for another book on Blurb.com. Here's the same photo with even more special effects:
No, this isn't one of my art projects - this is the white plastic underneath the fabric painting I was doing!!! The layers are from the last three projects I finished. I really got a kick out of finding this, and thought I'd share.